Carbureter.



A. R. PRIBIL.

CARBURETBR.

APPLICATION FILED 00124, 1911.

ALEXIS PRIBHQ, OF DETROIT, 'MICHIGAN'.

Specification of Letters'ilatent.l

CARBUBETEB. i

Patented 1360.2, 1913i l Application led October 4, 1911. Serial No.652,778.y A

therethrough in accordance with the speed of the engine.

l n g c simple and efficient means for controlling the operation of theair inlet valve to pre-` vent irregularity in its' opening movement andto provide certain vnew and useful feabeing ,had to which, i

tion of the same'on the line :1f-y of Fig. l; and'Fig. 3 is a sectionaldetail on the line e-c of Fig. l.

' This invention is applicable to any form of .rarbureter having achamber to which 4' f gasolene is supplied and' taken up by air drawnthrough the chamber by the suction stroke of an engine, but forconvenience of illustration, a construction is 'shown in which a castmetal easing is formed with a bodyl portionl and a laterally extendingportion 2 f-form-ing afloat chamber of any desired-construction a towhich gasolene is supplied through a, pipe 3 land from which it isconducted into the lower end of the body 1. by `apipe4.

The body .of the carbureter for-nis -an' enlarged air chamber 5 Iand areduced tubular extension 6 on the body,'forms a-r'niiihg chamber 7above the air chamber. Theupper -endof the extension 6 is formed with alaterally extending flange -S by means of which the carbureter maybeattached to'an engine manifold or other part to deliver explosivecharges to an engine cylinder upon the suction stro-ke of its 4Ins-ton.Within the extension 6 at the upper -endof the mixing chamber is theusual throttle -or butterfly This invention relates to improvements invThe object of the inventiomis to provide tures in the construction andarrangement of parts; the invention consisting in the mattershereinafter set forth and more particularly pointed out in the claims,referenceI the accompanying drawing in AFigure 1 is a -verticalsectionyon the line -m of Fig. 2 through a carbureter embody-l ing theinvention;- .Fig..2 is ahorizontal secy valve 9 for .controlling the Howof the explosive chargesto the engine.

The body 1 is provided with a screw- 'tlira'ded opening in its lower endiiito which isscrewed a hollowcapv 10 formed wi h a `peripheral openingcovered by a wire gauze or screenv 11 through which air is drawn intothe carbureter. The lower disk orend12 of the cap is formed with aninwardly extending hub portionlthrough which the gasolene supply pipeelextends vertically upward into the'air chamber 5 with a spray nozzle14 on its upper end adjacent the lower end of the mixing chamber 7. Theinner or upper end of the cap 10 Vis formed with an axial air inletopening 15, rand fitting within this opening is a vacuum valve 1G,having a lower head or disk 17 forming a closure for the opening 15 andprovided with an axial opening through which the pipe al extends,

the valvebei'ng adapted'to slide freely upon the pipe. Thevvalve head isalso formed with an upwardly .extending peripheral .guide wall 18 uponwhich is a tubular sleeve 19 havingan inwardly extending-flange 20 atits upper end to engage tlecupperV end of the wall18 of tlie'v`alve whenthe same is raisedf,` Asiinilar sleeve 21.1 is provided uponf the sleeve19 and a like sleeve `22 upon the sleeve 21, each of'the-latterfsleevesbeing also provided with an inwardly extending flange20`at its upper end'to engage the upper end 'of the adjacent innersleeve. These concentric sleeves are guided in their vertical movementby ribs 23 which extend radially inward from the wall of the airchamber, and each rib is formed with a shoulder 24 to engage the upperendof the outer sleeve 22l and limit the sleeves and valve in theirupward movement. Luge 25 are provided on the upper endv of the cap 10 toextend upward into the chamber v5 at each side of the valve 16, and eachof these lugs is formed with a notched inner edge forming stepped seats26 for the lower ends of the sleeves to support said sleeves atdifierent heights.

When in inoperative position, as shown in Fig. 1, the valve 16 restsupon the upper end 0f the hub 13 of the cap with its lower `endwithin-the air inlet opening 15 which is closed thereby, and theseveraljsleeves are supported at graduated heights by the stepped lugs25.

The air i"niet isl thus closed by the valve, butv upon the suction'stroke of the engine piston, ,said valve will be lifted by thepartialvacuum formed in the air chamber and air will be'drawnin .throughthescreen of the cap, upward through the opening 'l5 beneath the valveand lower edges of the sleeves into the air chamber. When thus lifted,theupper end of the wall 18v of said valve comes into contact with theflange A20 on the sleeve 19 which sleeve forms a movable weighted stopwili'always be stoppedat a certain height for the valve to its inertiabeyond the point to which the suction alone would vliftit. When givenfree'nlimited movement, the operation of thieva'lve is thereforeirregular, but by placifriprl the weighted stop in its path, the valvewhen actuated by-a given vacuum' and will not rise higher until thesuction increases suliicientl-y to overcome the added weight of thesleeve 19 when said sleeve will be lifted by the valve: Further.increase in the speed of the engme and consequent increased, .vacuumwill lift the valve and sleeve 19 until the upper end of said sleevecomes into contact with the flange on the sleeve 21.

`This`fsleeve 21 thus. becomes a Weighted movable stop to arrest theupward move- ,ment of the valve until the vacuum increases sufficientlyto lift the valve and both. of the sleeves, and the sleeve 22 serves ina like manner, as a third movable stop. The valve is thus arrested -inits upward movement at three different points, preventingany perceptiblevariation in its operation due to inertia or inability to respondquickly tothe l lapidvariations 1n the vacuum. Ifa very light valveis'used in order to obviate the difficulty arising from inertia, it willopen too freely and will not have sufficient Weight to cause it Ato fallquickly with the variations in the vacuum, but by providing the stopmembers Whi :h are lpicked up by the valve at diiierent points in itsupward movement,

the valve is ,weighted in proportion`to' the efo -. tion',1 novablestops the ing movement of said valve, and a fuel sup'- I'plv memberopening into said `chamber what I claim is:-

vacuum and caused to act quickly in its closing movement, at the sametime permittmg the use of'a comparatively light valve which wili openquickly in starting.

1. In a carbureter comprising a? casing having an air chamber providedwith an air inlet and an outlet, the'combination of avalve member forcontrolling the air inlet adapted to be automatically operated bysucpath of the openabove' said valve.

prevent its being carried by 2. In a carbureter comprising a' casinghaving an air chamber provided with an air.

inlet and an outlet, thelcombination of a valve, member controlling theair inlet adapted to be automatically operated by .l

suction, a movable gravity stop in the path of the opening movement ofsaid valve, and

a fuel supply member extending through said valv'e member and openinginto said chamber.

3. In a carburetor comprising 'a casing having an air chamber providedwith an air inlet andan outlet, thle combination of a fuel supply memberextending into said chamber through the inlet, a valve surrounding saidsupply member and con-trolling the inlet adapted to be automaticallyoperated by suction, and a plurality of movable members positioned atintervals along the path of travel 'of the valvev to form an increasingresistance to the opening of said valve.

4. In a 'carburetor comprising a casing having an air'chamber providedwith an air inletand an outlet, the combination of a,v

fuel supply member extending vertically through said -inlet into saidchamber, a valve A surrounding the member to control the. inlet Vand.adapted to'be automatically operated by suction, a. series ofconcentricgravity members in thepath of the opening movement of thevalve, and means for supporting said gravity members at differentheights to be successively lifted by thevalve:

'5. In a Vearbureter comprislng a casing having an air chamber providedwith an a1r inletandan outlet, the combination. of, ay

fuel supply member extending vertically through the inlet into saidchamber, a valve slidable upon saidmember for 'controlling the inlet andadapted to be lifted by suction, and a gravity member supported abovesaid valve concentrically therewith to be engaged and lifted thereby.

6. In a carburetor comprising a casingv having an air chamberprovidedwith an air inletand an outlet, the combination of a valvecontrolling the inlet adapted to be au-l tomatically operated bysuction, a plurality of concentric gravity `members adapted to besuccessively engaged and lifted by the valve, and means hav-ing seats atdifferent heights for. supporting said members con.- centrically withthe valve.

7. In a carbureter comprising a casing `having an air chamber providedwith an air inlet and an outlet, the combination of a valve member`controlling the"inlet and adapted to be automatically operated bysuction, a 'gravity member surrounding the valve member to be lifted -bythe-upward movement. of said valve, and means inthe chamber for guidingthe gravity member and forming a seat to support said member loweredposition.

above the valve member when the same isin inlet and an outlet, thecombination of a fuel ing said members at diHere'nt heights.

, suction, aplurality of concentric sleeves'onengaged by an adjacentVsleeve when the same is raised, a plurality of ribsin the air chamberforming guides for the outer sleeve, and members' having stepped innersides forming seats to be engaged by the lowen ends of y'the sleeves andsupport the same at different heights.

11. In a carbureter comprising a casing having an air chamber providedwith an air inlet and an outlet, the combination of a valve forcontrolling the inlet adapted to be operated by suction and ormedwith avertical peripheral wall, a plurality of gravity 8.. In a carburetercomprising acasing having an air chamber provided with an air inlet andan outlet, the combination of a cylindrical valve adapted to be operatedby said valve-adapted tobeysuccessiyely raised by the upward movement ofthe valve, meansl for supporting" rsaid sleeves at diil'erent heights,and guides for sadh'sleeyesin saidl chamber. l

9. In a carbureter comprising a casing having an air chamberprovided'with an airv supply member extending upward in the axis of saidinlet into said chamber, a valve slidableupcn said supply member tocontrol the air inlet, a plurality of concentric tubulai" gravitymembers surrounding the supply member and valve, and means within 'thechamber for guidingl said tubular members and stepped ribs forindependently supporteach other, each member being formed with aninwardly projecting liange atyits upper end, a plurality of ribs formingguides for the outer sleeve member, members having stepped inner sidesforming seats to support the sleeves at different heights, and a fuelsupply pipeextending upward through the `valve at its axis and` openinginto the air chamber.

In testimony whereof I aiiix in presence of two witnesses.

ALEXIS n. runen..

10. In a carbureter comprisinga casi g having anl air chamber providedwith an air inlet and an outlet, the combination of a valve controllingthe inlet adapted to be cperated by suction and formed with a peripheralwall, a plurality of sleeves sleeved upon said wall and uponone another,means upon the upper end of each sleevefadapted to be Witnesses: A v

ANNA M. Donn, A. M. SHANNON.

Y /f/ j Copies thi's patent may-be obtained for ve cents each, byaddressing the Commissioner of '.Patents,

Washington, D. C.

members sleeved upon said wall and upon in the air chamber my signature

